个人认为如果C对,
是不是因为要求的是:allow from 10.1.10 to 10.1.2, but the ACL applied to outbound direction.
通常此类ACL都是APPLY TO INBOUND INTERFACE,现在特地强调是outbound direction,所以这ACL是应用到对端设备出口端口上,这样的话,就应该是:
ip access-list extend EGRESS
5 permit ip 10.1.2.0 0.0.0.255 10.1.10.0 0.0.0.255